James hanley



UNITED sTATEs PATENT oEEIcE.

JAMES HANLEY, oE'NEw YORK, N. Y.

swivEE-NIBBED KEY.

specification of Lettes Patent No. 7,917, dated January 2s, 1851.

To all whom t may concern:

Be it known that I, JAMES HANLEY, of No.1() North Villiam street, in thecity of New York and Stateof New York, have invented a new and improvedmode of preventing a door-lock being opened from the outside by theaction of nippers4 or other `instruments being attached to theprojecting end of the key used in locking the door on the insideandthereby turning thekey in the lock and opening the door; and I herebyde- Clare that the following is a full and exact description thereof,reference being had to the accompanying drawings and the letters ofreference marked thereon. y

The nature of my invention consists in making the exposed or projectingend of the key (marked C) to revolve on an axisconnecting it with theother parts of the key so that this end `may; be seized and turnedeither way without producing any effect toward` openingthe lock ormoving the key in the wards. So that my improved key can `always be leftin the lock when the bolt is shot, thereby preventing the entrance ofanother key o-r pick, and also aording great security to the inmate of aroom thus fastened, not merely from robbers but f-or ready egress fromthe apartment in case of lire or sudden alarm when excitement or fearoften prevent the finding a key taken out of the lock or putting it inthe lock when fo-und.

My improvement consists substantially in making the` end of the key,that passes through the lock, to revolve, irrespective of the particularmechanical means by which it is attached to thekey, and one way ofcarrying out my invention is by making the eX- posed end of the key aseparate piece (marked on the drawing No. 4) having fan aXis (a) andwhich axis being fitted into a socket (S) .made in the key and attached,thereto by a shoulder (e) and pin orscrew (f) y the end (C) willrevolve either way without movingthe key in the wards.

` I therefore claim as my invention and desire to secure by LettersPatent- Themaking the exposed ends of keys in such manner that they mayrevolve freely upon the other parts of the key substantially in themanner and for the purposes described. i

. JAMES HANLEY.

Vitnesses: t l

SAMUEL OWEN, `JAMES C. STowALL,

